Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement Of Other Comprehensive Income [Abstract]
Net Loss	$ (10,325,464)	$ (6,290,546)	$ (23,388,120)	$ (20,286,414)
Other comprehensive (loss) income:
Foreign currency translation gain (loss)	110,625	(160,205)	106,585	(74,173)
Unrealized gain on available-for-sale securities				18,502
Comprehensive Loss	$ (10,214,839)	$ (6,450,751)	$ (23,281,535)	$ (20,342,085)